Niels poulson



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Leners Patent No. 80,215, ated July 21, 136s.

IMPROVEDMOVABLE WINDOW-BLIND.,

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T0 ALL WI-IOM IT MAY CONCERN: y

Beit known that I, NIELs PoULsON, of the city of Washington, District of Columbia, have invented a new 'and useful Improvement in Window-Blinds; Aand I do hereby declare the following to 'be a full, clear, and exact description of the same, reference being had to the accompanying drawings, makinga part of this speciication,- in which- Figure l is a front elevation. Figure 2 is vertical section on the line z zzz. Figure 3 isa horizontal section after line v o. Figure 4 is a' horizontal section on line y y, on a larger scale, showing a plan of a portion of the blind inv its elevated or folded condition.

Figure 5 is a vertical.seetion,`s'howing the slats in an inclined position.

Figure 6 is a vertical section, showing the blind drawn close together. i

Figure 7 is a. front view., illustrating the use of a jointed rod for tilting the slats.

The' same letters of reference, where employed, denote identical parts.

The nature of my invention consists in constructing movable blinds invsuch a manner that they, when not in use, are drawn up and kept in a hollow space above the window-frame, in which position they are entirely out of sight,

The slats are fastened in such manner gn cross-tics that when they are drawn up they form several rows by Y the side of each other. By this arrangement I save room, or,rather, I canf'enclose the blind in a space where the width as well as the height is taken into use.

To enable others skilled inthe art to'make`and use my improvement, I will proceed to describe its construction and operation. i

In order to raise and lower the blind, I employ the well-known'device of pivotingtwobars, A A2, (of same lengtln) together at their'fcentres, A, forming a cross-tie, which allows the ends of the t'wo bars to be drawn close together or spread from each other. Y Y

I connect as many cross-ties as deemed necessary by pivoting them at their ends A", one above the other, whereby they all work simultaneously 'when acted upon. Fig. 5 represents a series of such crossties in a'position' when stretched out at their full length.

It will be seen that when in such position the centres A are not in the same vertical line as `the points,4

where the ends of the bars are pivoted together, but a. space, A", is left between the ends A A" of the bars, and the centres A lie in a vertical' line passing through the middle of said space, in order to avoid what is termed a dead-point, and no additional force is needed to draw the bars AAZ togetherwhen in such position. To arci-l friction, I provide the joints with washer B', preventing the bars from rubbing against each other.

"he barsl or links A A2 are pivoted together in pnirs, and the slats are pivoted to the inner bar A of each pair. A is the centre, where the bars are pivoted together, and A A. are holes,in which the axles of the slats rest. v Y

The holes A are placed at such a distance from each other, that when the slats B are inserted they` will lap over each other, as shown in g. 6. The holes A are not placed in the middle of the bars, but one hole.

put at the lower and one at the upper edge, so as to bring them all intoone vertical line when stretched out, as

Vshown in iig. 5, and in order to strengthen the bar A at such places, a'projection is employed. At the centre Af a pin, F, is attached to, the cross-tie, the function of which lis to slide in a vertical groove,\G, or hollow pipe, or other recess in the window-frame, and thereby guide the blind and keep it in a. vertical position, as shown in iig. 6. I

As the blind is prevented from being drawn to either side, a steady motion willbe given to it when draiwn up or pulled down. p

The drawings show the sluts arranged in three rows, that is to say, three slats on each pair of links or bars, but any number may be used with the same advantage, and in ordinary dwelling-houses, where the height of the window'is not Iso extensive, nor the window-jamb so very wide, two rows of slats may be preferable.

Fig. 6 shows the position of the-slats when drawn close together, and conned in a hollow space, F, above the window-frame. I In such position they take up only about four inches in height, and four inches in width, for a blind that, when lowered down to its full length, will cover a space of fty-six inches in height.

The slatsB are the same shape as those new in general use.` They may be manufactured either of wood or metal of a, rectangular form, tapering off towards the sides, with rounded edges. -At both their ends they are provided with an axle or pin, H, long enough to pass through the hole made to receive them in the bars of the cross-tie, wherein they work freely.

The slats en each bar, (the drawing shows three I connectv together by a vertical rod, I, fastened at the sides of the slats, and the cordor metallic chain K, which operates the slats, is attached to one of the slats of each bar.

In order to place the slats B in any desired position, (either to darken or admit light into the room,) I attach two cords, K Kl, one fastened to the outside of every one of the upper slats on each bar, and one cord fastened to the inside of every one 0f the lower slats on each bar.

Instead of cords or chains on both sides of the slats, a jointed rod may be employed on one side only, as shown at K2, in iig. 7, which, by its capacity of both drawing and thrusting, will serve to tilt the slats ineither direction, v

When the slats are drawn up, the cord will also be drawn up, and rest between the edges of the slats and the wall. y

The dotted lines in {ig/5 show the cross-ties A in a position when about halt` drawn up. As the pins Fi Aj move in the recess Gr, in the window-frame, the slat B, placed at the centre of the bar, will consequently move in a vertical line, while theslats at either side of same bars, as the cross-tie is drawn out, will occupy a position to the left and right of the centre-slet.

The cord or chain L, used to hoist the blinds, is placed in a hollow Avertical space extending into the wall,

and I propose to make the hollow pipe or recess Gr, in which the pins F slide, deep enough to'allow the cord or` chain Into move up and down. l

The manner of operating the cord may be varied; still, I recommend a winch, M, tobe used, as the most convenicnt'means, and it may be made ornamental.

The chain or cord L is fastened to a rail, C, attached to the lower cross-tie. The said rail C maybe made of suflicient width to completely close the box or recess F, which receives the folded blind, or a separate plate, E, may be attached to the rail for this purpose.

The upper crosstie is firmly attached to a hanger, N, and may easily be removed from the inside if desired, but` may be made inaccessible from withoutI I If the window to which the blinds are to be applied is very wide, it is preferable to construct the slats in two lengths, as shown in fig. 3, at a. I may employ my blinds as well outside as inside the window, and provide them with fastenings, thereby preventing the blind being lifted. Fig. 2 shows a device for fastening the blind to the sill of the window. O is a bolt, placed in a horizontal position in the window-sill, and adapted to engage in a recess, I), iig. 6, formed in the rail C, attached to the lower cross-tie. In such position it locks the` blind, and can be withdrawn only from the inside. In order to facilitate the movement ot' the blind, a spring or weight may be employed to balance the blind.

lhe recess in which the blind is kept may be placed either above the window, as shown in the drawings, or may beat the sides. v

I-I-.wing thus described my improvement, what I claim as my invention, and desire to secure by Letters Patent, is as follows:

1. I claim the pivoted bars or links A A2, for elevating or lowering a pivot-Slat blind, and permitting the tilting of the slats B, when lowered, substantially as and for the purposes set forth. n

2. I claim the arrangement of two or more slats, B, on each of the bars A, to adapt the blind to fold within a smaller vertical space, as explained. K 4

3. I claim the combination of the hinged bars A A2, pivoted slats B, connecting-bars I, and tilting-cords, chains, or rods K K1 K2, substantially as described.

4. I claim the combination of the en'closed elevating-cord or chain L, hanger N, guide-pins F, vertical grooves G, and fastening C P O, with the bars A2 and slats B B, for the purpose of raising and lowering the blind, and locking it securely in its extended or closed position.

" 5. I claim the plate E, in combination with the hinged bars A A2, and with thebox or recess for enclosing thefolded blind out of sight, as described. l v

NIELS POUI'ISON.

Witnesses:

OCTAVIUs KNIGHT, WM. H. Bannieres. 

